The Pressure Cooker Gasket or Pressure Cooker Sealing Ring should be inspected each time you use your Pressure Cooker.Over time your Pressure Cooker Gasket may get hard and brittle. Look for cracks in the Pressure Cooker Sealing Ring or Pressure Cooker Gasket. This may cause your Pressure Cooker Gaskets or Pressure Cooker Sealing Ring to leak.If your Pressure Cooker Gasket is leaking it should be replaced with a new Pressure Cooker Gasket or Pressure Cooker Sealing Ring.